1301.3542 (N. B. Manson et al.)

Assignment of the NV0 575 nm zero-phonon line in diamond to a 2E-2A2
transition    [PDF]

N. B. Manson, K. Beha, A. Batalov, L. J. Rogers, M. W. Doherty, R. Bratschitsch, A. Leitenstorfer

The time-averaged emission spectrum of single nitrogen-vacancy defects in diamond gives zero-phonon lines of both the negative charge state at 637 nm (1.945 eV) and the neutral charge state at 575 nm (2.156 eV). This occurs through photo-conversion between the two charge states. Due to strain in the diamond the zero-phonon lines are split and it is found that the splitting and polarization of the two zero-phonon lines are the same. From this observation and consideration of the electronic structure of the nitrogen-vacancy center it is concluded that the excited state of the neutral center has A2 orbital symmetry. The assignment of the 575 nm transition to a 2E - 2A2 transition has not been established previously.

View original: http://arxiv.org/abs/1301.3542